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Puzzle two + gitignore

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Benjamyn Love 2023-12-02 17:03:07 +11:00
parent 564b907aff
commit df0e5d1bcf
3 changed files with 1346 additions and 0 deletions
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.gitignore vendored Normal file
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main

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day1/puzzle2/input Normal file
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day1/puzzle2/main.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <ctype.h>
#include <string.h>
int two_char_two_interger(int a, int b)
{
// int a is the 10's
// int b is the 1's
int num = (a * 10) + b;
// printf("Got number: %i\n", num);
return num;
}
int is_one(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(3);
memcpy(str2, str, (size_t)3);
if (strcmp(str2, "one") == 0)
{
return 0;
}
return 1;
}
int is_two(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(3);
memcpy(str2, str, (size_t)3);
if (strcmp(str2, "two") == 0)
{
return 0;
}
return 1;
}
int is_three(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(5);
memcpy(str2, str, (size_t)5);
if (strcmp(str2, "three") == 0)
{
return 0;
}
return 1;
}
int is_four(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(4);
memcpy(str2, str, (size_t)4);
if (strcmp(str2, "four") == 0)
{
return 0;
}
return 1;
}
int is_five(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(4);
memcpy(str2, str, (size_t)4);
if (strcmp(str2, "five") == 0)
{
return 0;
}
return 1;
}
int is_six(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(3);
memcpy(str2, str, (size_t)3);
if (strcmp(str2, "six") == 0)
{
return 0;
}
return 1;
}
int is_seven(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(5);
memcpy(str2, str, (size_t)5);
if (strcmp(str2, "seven") == 0)
{
return 0;
}
return 1;
}
int is_eight(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(5);
memcpy(str2, str, (size_t)5);
if (strcmp(str2, "eight") == 0)
{
return 0;
}
return 1;
}
int is_nine(char *str)
{
// printf("%c", ptr[j]);
char *str2;
str2 = (char *)malloc(4);
memcpy(str2, str, (size_t)4);
if (strcmp(str2, "nine") == 0)
{
return 0;
}
return 1;
}
int main()
{
const char *inputFile = "/home/ben/Documents/Projects/C/advent-of-code/day1/puzzle1/input";
int fd = open(inputFile, O_RDONLY);
if (fd < 0)
{
printf("\n\"%s \" could not open\n", inputFile);
exit(1);
}
struct stat statbuf;
int err = fstat(fd, &statbuf);
if (err < 0)
{
printf("\n\"%s \" could not open\n", inputFile);
exit(2);
}
char *ptr = mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (ptr == MAP_FAILED)
{
printf("Mapping Failed\n");
return 1;
}
int in_line = 0;
int first_num = -1;
int last_num;
char cur_char;
int total = 0;
// int numbers[1000];
int freePos = 0;
int lineOffset;
for (int i = 0; i < statbuf.st_size; i++)
{
if (in_line == 0)
{
in_line = 1;
for (i; i < __INT64_MAX__; i++)
{
lineOffset = i;
cur_char = ptr[i];
switch (cur_char)
{
case 'o': // one
if (is_one(&ptr[i]) == 0)
{
if (first_num == -1)
{
first_num = 1;
}
last_num = 1;
}
break;
case 't': // two, three
if (is_two(&ptr[i]) == 1)
{
if (is_three(&ptr[i]) == 0)
{
if (first_num == -1)
{
first_num = 3;
}
last_num = 3;
}
}
else
{
if (first_num == -1)
{
first_num = 2;
}
last_num = 2;
}
break;
case 'f': // four, five
if (is_four(&ptr[i]) == 1)
{
if (is_five(&ptr[i]) == 0)
{
if (first_num == -1)
{
first_num = 5;
}
last_num = 5;
}
}
else
{
if (first_num == -1)
{
first_num = 4;
}
last_num = 4;
}
break;
case 's': // six, seven
if (is_six(&ptr[i]) == 1)
{
if (is_seven(&ptr[i]) == 0)
{
if (first_num == -1)
{
first_num = 7;
}
last_num = 7;
}
}
else
{
if (first_num == -1)
{
first_num = 6;
}
last_num = 6;
}
break;
case 'e': // eight
if (is_eight(&ptr[i]) == 0)
{
if (first_num == -1)
{
first_num = 8;
}
last_num = 8;
}
break;
case 'n': // nine
if (is_nine(&ptr[i]) == 0)
{
if (first_num == -1)
{
first_num = 9;
}
last_num = 9;
}
break;
default:
break;
}
if isdigit (cur_char)
{
if (first_num == -1)
{
// We have not set a first number yet
first_num = (int)cur_char - '0';
last_num = (int)cur_char - '0';
continue;
}
last_num = (int)cur_char - '0';
}
if (cur_char == 0x0A)
{
if (last_num != -1)
{
// printf("First num = %i\t", first_num);
// printf("Last num = %i\n", last_num);
total += two_char_two_interger(first_num, last_num);
}
first_num = -1;
last_num = -1;
in_line = 0;
// printf("Line break\n");
break;
}
}
}
// printf("%X\n", ptr[i]);
}
printf("Total is: %i\n", total);
// ssize_t n = write(1, ptr, statbuf.st_size);
// if (n != statbuf.st_size)
// {
// printf("Write Failed");
// }
err = munmap(ptr, statbuf.st_size);
if (err != 0)
{
printf("Unmapping Failed\n");
return 1;
}
close(fd);
return 0;
}